A series of ethynylarene compounds containing 2-(1,2,3-triazol-4-yl)pyridine chelating units were
studied as fluorescent chemosensors for metal cations in aqueous solution. Analogs possessing two
chelating units bridged by either 1,4-diethynylphenyl or 2,7-diethynylnaphthyl subunits displayed large
hypsochromic shifts coupled with signal intensification when exposed to increasing concentrations of
Ni(II), a unique response among 22 metal cation analytes. This response was shown to be reversible,
and is proposed to derive from disruption of aggregate formation upon Ni(II) binding at the peripheral
chelating units.
A series of ethynylarene compounds containing 2-(1,2,3-triazol-4-yl)pyridine chelating units werestudied as fluorescent chemosensors for metal cations in aqueous solution. Analogs possessing twochelating units bridged by either 1,4-diethynylphenyl or 2,7-diethynylnaphthyl subunits displayed largehypsochromic shifts coupled with signal intensification when exposed to increasing concentrations ofNi(II), a unique response among 22 metal cation analytes. This response was shown to be reversible,and is proposed to derive from disruption of aggregate formation upon Ni(II) binding at the peripheralchelating units.
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